Mercurial > hg > truffle
annotate src/share/vm/opto/bytecodeInfo.cpp @ 7555:9c6602e65423
Updated .hgignore file to also ignore IntelliJ project files.
author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
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date | Fri, 25 Jan 2013 11:11:32 +0100 |
parents | 989155e2d07a |
children | 5fc51c1ecdeb |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1998, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "ci/ciReplay.hpp" |
1972 | 27 #include "classfile/systemDictionary.hpp" |
28 #include "classfile/vmSymbols.hpp" | |
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29 #include "compiler/compileBroker.hpp" |
1972 | 30 #include "compiler/compileLog.hpp" |
31 #include "interpreter/linkResolver.hpp" | |
32 #include "oops/objArrayKlass.hpp" | |
33 #include "opto/callGenerator.hpp" | |
34 #include "opto/parse.hpp" | |
35 #include "runtime/handles.inline.hpp" | |
0 | 36 |
37 //============================================================================= | |
38 //------------------------------InlineTree------------------------------------- | |
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39 InlineTree::InlineTree(Compile* c, |
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40 const InlineTree *caller_tree, ciMethod* callee, |
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41 JVMState* caller_jvms, int caller_bci, |
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42 float site_invoke_ratio, int max_inline_level) : |
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43 C(c), |
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44 _caller_jvms(caller_jvms), |
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45 _caller_tree((InlineTree*) caller_tree), |
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46 _method(callee), |
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47 _site_invoke_ratio(site_invoke_ratio), |
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48 _max_inline_level(max_inline_level), |
7473 | 49 _count_inline_bcs(method()->code_size_for_inlining()), |
50 _subtrees(c->comp_arena(), 2, 0, NULL) | |
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51 { |
0 | 52 NOT_PRODUCT(_count_inlines = 0;) |
53 if (_caller_jvms != NULL) { | |
54 // Keep a private copy of the caller_jvms: | |
55 _caller_jvms = new (C) JVMState(caller_jvms->method(), caller_tree->caller_jvms()); | |
56 _caller_jvms->set_bci(caller_jvms->bci()); | |
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57 assert(!caller_jvms->should_reexecute(), "there should be no reexecute bytecode with inlining"); |
0 | 58 } |
59 assert(_caller_jvms->same_calls_as(caller_jvms), "consistent JVMS"); | |
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60 assert((caller_tree == NULL ? 0 : caller_tree->stack_depth() + 1) == stack_depth(), "correct (redundant) depth parameter"); |
0 | 61 assert(caller_bci == this->caller_bci(), "correct (redundant) bci parameter"); |
62 if (UseOldInlining) { | |
63 // Update hierarchical counts, count_inline_bcs() and count_inlines() | |
64 InlineTree *caller = (InlineTree *)caller_tree; | |
65 for( ; caller != NULL; caller = ((InlineTree *)(caller->caller_tree())) ) { | |
66 caller->_count_inline_bcs += count_inline_bcs(); | |
67 NOT_PRODUCT(caller->_count_inlines++;) | |
68 } | |
69 } | |
70 } | |
71 | |
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72 InlineTree::InlineTree(Compile* c, ciMethod* callee_method, JVMState* caller_jvms, |
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73 float site_invoke_ratio, int max_inline_level) : |
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74 C(c), |
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75 _caller_jvms(caller_jvms), |
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76 _caller_tree(NULL), |
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77 _method(callee_method), |
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78 _site_invoke_ratio(site_invoke_ratio), |
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79 _max_inline_level(max_inline_level), |
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80 _count_inline_bcs(method()->code_size()) |
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81 { |
0 | 82 NOT_PRODUCT(_count_inlines = 0;) |
83 assert(!UseOldInlining, "do not use for old stuff"); | |
84 } | |
85 | |
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86 static bool is_init_with_ea(ciMethod* callee_method, |
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87 ciMethod* caller_method, Compile* C) { |
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88 // True when EA is ON and a java constructor is called or |
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89 // a super constructor is called from an inlined java constructor. |
244 | 90 return C->do_escape_analysis() && EliminateAllocations && |
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91 ( callee_method->is_initializer() || |
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92 (caller_method->is_initializer() && |
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93 caller_method != C->method() && |
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94 caller_method->holder()->is_subclass_of(callee_method->holder())) |
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95 ); |
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96 } |
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97 |
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98 // positive filter: should callee be inlined? returns NULL, if yes, or rejection msg |
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99 const char* InlineTree::should_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result) const { |
0 | 100 // Allows targeted inlining |
101 if(callee_method->should_inline()) { | |
102 *wci_result = *(WarmCallInfo::always_hot()); | |
103 if (PrintInlining && Verbose) { | |
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104 CompileTask::print_inline_indent(inline_level()); |
0 | 105 tty->print_cr("Inlined method is hot: "); |
106 } | |
107 return NULL; | |
108 } | |
109 | |
110 // positive filter: should send be inlined? returns NULL (--> yes) | |
111 // or rejection msg | |
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112 int size = callee_method->code_size_for_inlining(); |
0 | 113 |
114 // Check for too many throws (and not too huge) | |
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115 if(callee_method->interpreter_throwout_count() > InlineThrowCount && |
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116 size < InlineThrowMaxSize ) { |
0 | 117 wci_result->set_profit(wci_result->profit() * 100); |
118 if (PrintInlining && Verbose) { | |
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119 CompileTask::print_inline_indent(inline_level()); |
0 | 120 tty->print_cr("Inlined method with many throws (throws=%d):", callee_method->interpreter_throwout_count()); |
121 } | |
122 return NULL; | |
123 } | |
124 | |
125 if (!UseOldInlining) { | |
126 return NULL; // size and frequency are represented in a new way | |
127 } | |
128 | |
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129 int default_max_inline_size = C->max_inline_size(); |
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130 int inline_small_code_size = InlineSmallCode / 4; |
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131 int max_inline_size = default_max_inline_size; |
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132 |
0 | 133 int call_site_count = method()->scale_count(profile.count()); |
134 int invoke_count = method()->interpreter_invocation_count(); | |
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135 |
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136 assert(invoke_count != 0, "require invocation count greater than zero"); |
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137 int freq = call_site_count / invoke_count; |
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138 |
0 | 139 // bump the max size if the call is frequent |
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140 if ((freq >= InlineFrequencyRatio) || |
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141 (call_site_count >= InlineFrequencyCount) || |
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142 is_init_with_ea(callee_method, caller_method, C)) { |
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143 |
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144 max_inline_size = C->freq_inline_size(); |
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145 if (size <= max_inline_size && TraceFrequencyInlining) { |
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146 CompileTask::print_inline_indent(inline_level()); |
0 | 147 tty->print_cr("Inlined frequent method (freq=%d count=%d):", freq, call_site_count); |
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148 CompileTask::print_inline_indent(inline_level()); |
0 | 149 callee_method->print(); |
150 tty->cr(); | |
151 } | |
152 } else { | |
153 // Not hot. Check for medium-sized pre-existing nmethod at cold sites. | |
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154 if (callee_method->has_compiled_code() && |
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155 callee_method->instructions_size() > inline_small_code_size) |
0 | 156 return "already compiled into a medium method"; |
157 } | |
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158 if (size > max_inline_size) { |
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159 if (max_inline_size > default_max_inline_size) |
0 | 160 return "hot method too big"; |
161 return "too big"; | |
162 } | |
163 return NULL; | |
164 } | |
165 | |
166 | |
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167 // negative filter: should callee NOT be inlined? returns NULL, ok to inline, or rejection msg |
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168 const char* InlineTree::should_not_inline(ciMethod *callee_method, ciMethod* caller_method, WarmCallInfo* wci_result) const { |
0 | 169 // negative filter: should send NOT be inlined? returns NULL (--> inline) or rejection msg |
170 if (!UseOldInlining) { | |
171 const char* fail = NULL; | |
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172 if ( callee_method->is_abstract()) fail = "abstract method"; |
0 | 173 // note: we allow ik->is_abstract() |
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174 if (!callee_method->holder()->is_initialized()) fail = "method holder not initialized"; |
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175 if ( callee_method->is_native()) fail = "native method"; |
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176 if ( callee_method->dont_inline()) fail = "don't inline by annotation"; |
0 | 177 |
178 if (fail) { | |
179 *wci_result = *(WarmCallInfo::always_cold()); | |
180 return fail; | |
181 } | |
182 | |
183 if (callee_method->has_unloaded_classes_in_signature()) { | |
184 wci_result->set_profit(wci_result->profit() * 0.1); | |
185 } | |
186 | |
187 // don't inline exception code unless the top method belongs to an | |
188 // exception class | |
189 if (callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
190 ciMethod* top_method = caller_jvms() ? caller_jvms()->of_depth(1)->method() : method(); | |
191 if (!top_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
192 wci_result->set_profit(wci_result->profit() * 0.1); | |
193 } | |
194 } | |
195 | |
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196 if (callee_method->has_compiled_code() && |
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197 callee_method->instructions_size() > InlineSmallCode) { |
0 | 198 wci_result->set_profit(wci_result->profit() * 0.1); |
199 // %%% adjust wci_result->size()? | |
200 } | |
201 | |
202 return NULL; | |
203 } | |
204 | |
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205 // First check all inlining restrictions which are required for correctness |
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206 if ( callee_method->is_abstract()) return "abstract method"; |
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207 // note: we allow ik->is_abstract() |
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208 if (!callee_method->holder()->is_initialized()) return "method holder not initialized"; |
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209 if ( callee_method->is_native()) return "native method"; |
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210 if ( callee_method->dont_inline()) return "don't inline by annotation"; |
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211 if ( callee_method->has_unloaded_classes_in_signature()) return "unloaded signature classes"; |
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212 |
7473 | 213 if (callee_method->should_inline()) { |
0 | 214 // ignore heuristic controls on inlining |
215 return NULL; | |
216 } | |
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217 if (callee_method->should_not_inline()) { |
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218 return "disallowed by CompilerOracle"; |
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219 } |
0 | 220 |
221 // Now perform checks which are heuristic | |
222 | |
7473 | 223 if (!callee_method->force_inline()) { |
224 if (callee_method->has_compiled_code() && | |
225 callee_method->instructions_size() > InlineSmallCode) { | |
0 | 226 return "already compiled into a big method"; |
7473 | 227 } |
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228 } |
0 | 229 |
230 // don't inline exception code unless the top method belongs to an | |
231 // exception class | |
232 if (caller_tree() != NULL && | |
233 callee_method->holder()->is_subclass_of(C->env()->Throwable_klass())) { | |
234 const InlineTree *top = this; | |
235 while (top->caller_tree() != NULL) top = top->caller_tree(); | |
236 ciInstanceKlass* k = top->method()->holder(); | |
237 if (!k->is_subclass_of(C->env()->Throwable_klass())) | |
238 return "exception method"; | |
239 } | |
240 | |
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241 if (callee_method->should_not_inline()) { |
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242 return "disallowed by CompilerOracle"; |
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243 } |
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244 |
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245 #ifndef PRODUCT |
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246 if (ciReplay::should_not_inline(callee_method)) { |
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247 return "disallowed by ciReplay"; |
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248 } |
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249 #endif |
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250 |
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251 if (UseStringCache) { |
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252 // Do not inline StringCache::profile() method used only at the beginning. |
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253 if (callee_method->name() == ciSymbol::profile_name() && |
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254 callee_method->holder()->name() == ciSymbol::java_lang_StringCache()) { |
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255 return "profiling method"; |
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256 } |
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257 } |
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258 |
0 | 259 // use frequency-based objections only for non-trivial methods |
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260 if (callee_method->code_size() <= MaxTrivialSize) return NULL; |
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261 |
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262 // don't use counts with -Xcomp or CTW |
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263 if (UseInterpreter && !CompileTheWorld) { |
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264 |
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265 if (!callee_method->has_compiled_code() && |
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266 !callee_method->was_executed_more_than(0)) { |
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267 return "never executed"; |
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268 } |
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269 |
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270 if (is_init_with_ea(callee_method, caller_method, C)) { |
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271 |
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272 // Escape Analysis: inline all executed constructors |
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273 |
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274 } else if (!callee_method->was_executed_more_than(MIN2(MinInliningThreshold, |
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275 CompileThreshold >> 1))) { |
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276 return "executed < MinInliningThreshold times"; |
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277 } |
0 | 278 } |
279 | |
280 return NULL; | |
281 } | |
282 | |
283 //-----------------------------try_to_inline----------------------------------- | |
284 // return NULL if ok, reason for not inlining otherwise | |
285 // Relocated from "InliningClosure::try_to_inline" | |
7473 | 286 const char* InlineTree::try_to_inline(ciMethod* callee_method, ciMethod* caller_method, int caller_bci, ciCallProfile& profile, WarmCallInfo* wci_result, bool& should_delay) { |
0 | 287 // Old algorithm had funny accumulating BC-size counters |
288 if (UseOldInlining && ClipInlining | |
289 && (int)count_inline_bcs() >= DesiredMethodLimit) { | |
7473 | 290 if (!callee_method->force_inline() || !IncrementalInline) { |
291 return "size > DesiredMethodLimit"; | |
292 } else if (!C->inlining_incrementally()) { | |
293 should_delay = true; | |
294 } | |
0 | 295 } |
296 | |
297 const char *msg = NULL; | |
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298 msg = should_inline(callee_method, caller_method, caller_bci, profile, wci_result); |
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299 if (msg != NULL) |
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300 return msg; |
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301 |
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302 msg = should_not_inline(callee_method, caller_method, wci_result); |
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303 if (msg != NULL) |
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304 return msg; |
0 | 305 |
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306 if (InlineAccessors && callee_method->is_accessor()) { |
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307 // accessor methods are not subject to any of the following limits. |
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308 return NULL; |
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309 } |
0 | 310 |
311 // suppress a few checks for accessors and trivial methods | |
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312 if (callee_method->code_size() > MaxTrivialSize) { |
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313 |
0 | 314 // don't inline into giant methods |
7473 | 315 if (C->over_inlining_cutoff()) { |
316 if ((!callee_method->force_inline() && !caller_method->is_compiled_lambda_form()) | |
317 || !IncrementalInline) { | |
318 return "NodeCountInliningCutoff"; | |
319 } else { | |
320 should_delay = true; | |
321 } | |
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322 } |
0 | 323 |
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324 if ((!UseInterpreter || CompileTheWorld) && |
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325 is_init_with_ea(callee_method, caller_method, C)) { |
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326 |
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327 // Escape Analysis stress testing when running Xcomp or CTW: |
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328 // inline constructors even if they are not reached. |
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329 |
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330 } else if (profile.count() == 0) { |
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331 // don't inline unreached call sites |
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332 return "call site not reached"; |
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333 } |
0 | 334 } |
335 | |
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336 if (!C->do_inlining() && InlineAccessors) { |
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337 return "not an accessor"; |
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338 } |
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339 if (inline_level() > _max_inline_level) { |
7473 | 340 if (!callee_method->force_inline() || !IncrementalInline) { |
341 return "inlining too deep"; | |
342 } else if (!C->inlining_incrementally()) { | |
343 should_delay = true; | |
344 } | |
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345 } |
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346 |
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347 // detect direct and indirect recursive inlining |
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348 if (!callee_method->is_compiled_lambda_form()) { |
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349 // count the current method and the callee |
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350 int inline_level = (method() == callee_method) ? 1 : 0; |
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351 if (inline_level > MaxRecursiveInlineLevel) |
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352 return "recursively inlining too deep"; |
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353 // count callers of current method and callee |
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354 JVMState* jvms = caller_jvms(); |
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355 while (jvms != NULL && jvms->has_method()) { |
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356 if (jvms->method() == callee_method) { |
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357 inline_level++; |
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358 if (inline_level > MaxRecursiveInlineLevel) |
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359 return "recursively inlining too deep"; |
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360 } |
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361 jvms = jvms->caller(); |
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362 } |
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363 } |
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364 |
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365 int size = callee_method->code_size_for_inlining(); |
0 | 366 |
367 if (UseOldInlining && ClipInlining | |
368 && (int)count_inline_bcs() + size >= DesiredMethodLimit) { | |
7473 | 369 if (!callee_method->force_inline() || !IncrementalInline) { |
370 return "size > DesiredMethodLimit"; | |
371 } else if (!C->inlining_incrementally()) { | |
372 should_delay = true; | |
373 } | |
0 | 374 } |
375 | |
376 // ok, inline this method | |
377 return NULL; | |
378 } | |
379 | |
380 //------------------------------pass_initial_checks---------------------------- | |
381 bool pass_initial_checks(ciMethod* caller_method, int caller_bci, ciMethod* callee_method) { | |
382 ciInstanceKlass *callee_holder = callee_method ? callee_method->holder() : NULL; | |
383 // Check if a callee_method was suggested | |
384 if( callee_method == NULL ) return false; | |
385 // Check if klass of callee_method is loaded | |
386 if( !callee_holder->is_loaded() ) return false; | |
387 if( !callee_holder->is_initialized() ) return false; | |
388 if( !UseInterpreter || CompileTheWorld /* running Xcomp or CTW */ ) { | |
389 // Checks that constant pool's call site has been visited | |
390 // stricter than callee_holder->is_initialized() | |
391 ciBytecodeStream iter(caller_method); | |
392 iter.force_bci(caller_bci); | |
393 Bytecodes::Code call_bc = iter.cur_bc(); | |
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394 // An invokedynamic instruction does not have a klass. |
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395 if (call_bc != Bytecodes::_invokedynamic) { |
1565 | 396 int index = iter.get_index_u2_cpcache(); |
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397 if (!caller_method->is_klass_loaded(index, true)) { |
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398 return false; |
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399 } |
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400 // Try to do constant pool resolution if running Xcomp |
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401 if( !caller_method->check_call(index, call_bc == Bytecodes::_invokestatic) ) { |
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402 return false; |
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403 } |
0 | 404 } |
405 } | |
406 // We will attempt to see if a class/field/etc got properly loaded. If it | |
407 // did not, it may attempt to throw an exception during our probing. Catch | |
408 // and ignore such exceptions and do not attempt to compile the method. | |
409 if( callee_method->should_exclude() ) return false; | |
410 | |
411 return true; | |
412 } | |
413 | |
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414 //------------------------------check_can_parse-------------------------------- |
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415 const char* InlineTree::check_can_parse(ciMethod* callee) { |
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416 // Certain methods cannot be parsed at all: |
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417 if ( callee->is_native()) return "native method"; |
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418 if ( callee->is_abstract()) return "abstract method"; |
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419 if (!callee->can_be_compiled()) return "not compilable (disabled)"; |
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420 if (!callee->has_balanced_monitors()) return "not compilable (unbalanced monitors)"; |
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421 if ( callee->get_flow_analysis()->failing()) return "not compilable (flow analysis failed)"; |
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422 return NULL; |
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423 } |
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424 |
0 | 425 //------------------------------print_inlining--------------------------------- |
426 // Really, the failure_msg can be a success message also. | |
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427 void InlineTree::print_inlining(ciMethod* callee_method, int caller_bci, const char* failure_msg) const { |
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428 C->print_inlining(callee_method, inline_level(), caller_bci, failure_msg ? failure_msg : "inline"); |
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429 if (callee_method == NULL) tty->print(" callee not monotonic or profiled"); |
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430 if (Verbose && callee_method) { |
0 | 431 const InlineTree *top = this; |
432 while( top->caller_tree() != NULL ) { top = top->caller_tree(); } | |
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433 //tty->print(" bcs: %d+%d invoked: %d", top->count_inline_bcs(), callee_method->code_size(), callee_method->interpreter_invocation_count()); |
0 | 434 } |
435 } | |
436 | |
437 //------------------------------ok_to_inline----------------------------------- | |
7473 | 438 WarmCallInfo* InlineTree::ok_to_inline(ciMethod* callee_method, JVMState* jvms, ciCallProfile& profile, WarmCallInfo* initial_wci, bool& should_delay) { |
0 | 439 assert(callee_method != NULL, "caller checks for optimized virtual!"); |
7473 | 440 assert(!should_delay, "should be initialized to false"); |
0 | 441 #ifdef ASSERT |
442 // Make sure the incoming jvms has the same information content as me. | |
443 // This means that we can eventually make this whole class AllStatic. | |
444 if (jvms->caller() == NULL) { | |
445 assert(_caller_jvms == NULL, "redundant instance state"); | |
446 } else { | |
447 assert(_caller_jvms->same_calls_as(jvms->caller()), "redundant instance state"); | |
448 } | |
449 assert(_method == jvms->method(), "redundant instance state"); | |
450 #endif | |
451 const char *failure_msg = NULL; | |
452 int caller_bci = jvms->bci(); | |
453 ciMethod *caller_method = jvms->method(); | |
454 | |
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455 // Do some initial checks. |
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456 if (!pass_initial_checks(caller_method, caller_bci, callee_method)) { |
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457 if (PrintInlining) print_inlining(callee_method, caller_bci, "failed initial checks"); |
0 | 458 return NULL; |
459 } | |
460 | |
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461 // Do some parse checks. |
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462 failure_msg = check_can_parse(callee_method); |
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463 if (failure_msg != NULL) { |
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464 if (PrintInlining) print_inlining(callee_method, caller_bci, failure_msg); |
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465 return NULL; |
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466 } |
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467 |
0 | 468 // Check if inlining policy says no. |
469 WarmCallInfo wci = *(initial_wci); | |
7473 | 470 failure_msg = try_to_inline(callee_method, caller_method, caller_bci, profile, &wci, should_delay); |
0 | 471 if (failure_msg != NULL && C->log() != NULL) { |
6843 | 472 C->log()->inline_fail(failure_msg); |
0 | 473 } |
474 | |
475 #ifndef PRODUCT | |
476 if (UseOldInlining && InlineWarmCalls | |
477 && (PrintOpto || PrintOptoInlining || PrintInlining)) { | |
478 bool cold = wci.is_cold(); | |
479 bool hot = !cold && wci.is_hot(); | |
480 bool old_cold = (failure_msg != NULL); | |
481 if (old_cold != cold || (Verbose || WizardMode)) { | |
482 tty->print(" OldInlining= %4s : %s\n WCI=", | |
483 old_cold ? "cold" : "hot", failure_msg ? failure_msg : "OK"); | |
484 wci.print(); | |
485 } | |
486 } | |
487 #endif | |
488 if (UseOldInlining) { | |
489 if (failure_msg == NULL) | |
490 wci = *(WarmCallInfo::always_hot()); | |
491 else | |
492 wci = *(WarmCallInfo::always_cold()); | |
493 } | |
494 if (!InlineWarmCalls) { | |
495 if (!wci.is_cold() && !wci.is_hot()) { | |
496 // Do not inline the warm calls. | |
497 wci = *(WarmCallInfo::always_cold()); | |
498 } | |
499 } | |
500 | |
501 if (!wci.is_cold()) { | |
502 // In -UseOldInlining, the failure_msg may also be a success message. | |
503 if (failure_msg == NULL) failure_msg = "inline (hot)"; | |
504 | |
505 // Inline! | |
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506 if (PrintInlining) print_inlining(callee_method, caller_bci, failure_msg); |
0 | 507 if (UseOldInlining) |
508 build_inline_tree_for_callee(callee_method, jvms, caller_bci); | |
509 if (InlineWarmCalls && !wci.is_hot()) | |
510 return new (C) WarmCallInfo(wci); // copy to heap | |
511 return WarmCallInfo::always_hot(); | |
512 } | |
513 | |
514 // Do not inline | |
515 if (failure_msg == NULL) failure_msg = "too cold to inline"; | |
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516 if (PrintInlining) print_inlining(callee_method, caller_bci, failure_msg); |
0 | 517 return NULL; |
518 } | |
519 | |
520 //------------------------------compute_callee_frequency----------------------- | |
521 float InlineTree::compute_callee_frequency( int caller_bci ) const { | |
522 int count = method()->interpreter_call_site_count(caller_bci); | |
523 int invcnt = method()->interpreter_invocation_count(); | |
524 float freq = (float)count/(float)invcnt; | |
525 // Call-site count / interpreter invocation count, scaled recursively. | |
526 // Always between 0.0 and 1.0. Represents the percentage of the method's | |
527 // total execution time used at this call site. | |
528 | |
529 return freq; | |
530 } | |
531 | |
532 //------------------------------build_inline_tree_for_callee------------------- | |
533 InlineTree *InlineTree::build_inline_tree_for_callee( ciMethod* callee_method, JVMState* caller_jvms, int caller_bci) { | |
534 float recur_frequency = _site_invoke_ratio * compute_callee_frequency(caller_bci); | |
535 // Attempt inlining. | |
536 InlineTree* old_ilt = callee_at(caller_bci, callee_method); | |
537 if (old_ilt != NULL) { | |
538 return old_ilt; | |
539 } | |
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540 int max_inline_level_adjust = 0; |
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541 if (caller_jvms->method() != NULL) { |
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542 if (caller_jvms->method()->is_compiled_lambda_form()) |
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543 max_inline_level_adjust += 1; // don't count actions in MH or indy adapter frames |
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544 else if (callee_method->is_method_handle_intrinsic() || |
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545 callee_method->is_compiled_lambda_form()) { |
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546 max_inline_level_adjust += 1; // don't count method handle calls from java.lang.invoke implem |
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547 } |
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548 if (max_inline_level_adjust != 0 && PrintInlining && (Verbose || WizardMode)) { |
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549 CompileTask::print_inline_indent(inline_level()); |
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550 tty->print_cr(" \\-> discounting inline depth"); |
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551 } |
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552 if (max_inline_level_adjust != 0 && C->log()) { |
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553 int id1 = C->log()->identify(caller_jvms->method()); |
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554 int id2 = C->log()->identify(callee_method); |
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555 C->log()->elem("inline_level_discount caller='%d' callee='%d'", id1, id2); |
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556 } |
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557 } |
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558 InlineTree* ilt = new InlineTree(C, this, callee_method, caller_jvms, caller_bci, recur_frequency, _max_inline_level + max_inline_level_adjust); |
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559 _subtrees.append(ilt); |
0 | 560 |
561 NOT_PRODUCT( _count_inlines += 1; ) | |
562 | |
563 return ilt; | |
564 } | |
565 | |
566 | |
567 //---------------------------------------callee_at----------------------------- | |
568 InlineTree *InlineTree::callee_at(int bci, ciMethod* callee) const { | |
569 for (int i = 0; i < _subtrees.length(); i++) { | |
570 InlineTree* sub = _subtrees.at(i); | |
571 if (sub->caller_bci() == bci && callee == sub->method()) { | |
572 return sub; | |
573 } | |
574 } | |
575 return NULL; | |
576 } | |
577 | |
578 | |
579 //------------------------------build_inline_tree_root------------------------- | |
580 InlineTree *InlineTree::build_inline_tree_root() { | |
581 Compile* C = Compile::current(); | |
582 | |
583 // Root of inline tree | |
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584 InlineTree* ilt = new InlineTree(C, NULL, C->method(), NULL, -1, 1.0F, MaxInlineLevel); |
0 | 585 |
586 return ilt; | |
587 } | |
588 | |
589 | |
590 //-------------------------find_subtree_from_root----------------------------- | |
591 // Given a jvms, which determines a call chain from the root method, | |
592 // find the corresponding inline tree. | |
593 // Note: This method will be removed or replaced as InlineTree goes away. | |
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594 InlineTree* InlineTree::find_subtree_from_root(InlineTree* root, JVMState* jvms, ciMethod* callee) { |
0 | 595 InlineTree* iltp = root; |
596 uint depth = jvms && jvms->has_method() ? jvms->depth() : 0; | |
597 for (uint d = 1; d <= depth; d++) { | |
598 JVMState* jvmsp = jvms->of_depth(d); | |
599 // Select the corresponding subtree for this bci. | |
600 assert(jvmsp->method() == iltp->method(), "tree still in sync"); | |
601 ciMethod* d_callee = (d == depth) ? callee : jvms->of_depth(d+1)->method(); | |
602 InlineTree* sub = iltp->callee_at(jvmsp->bci(), d_callee); | |
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603 if (sub == NULL) { |
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604 if (d == depth) { |
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605 sub = iltp->build_inline_tree_for_callee(d_callee, jvmsp, jvmsp->bci()); |
0 | 606 } |
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607 guarantee(sub != NULL, "should be a sub-ilt here"); |
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608 return sub; |
0 | 609 } |
610 iltp = sub; | |
611 } | |
612 return iltp; | |
613 } | |
3939 | 614 |
615 | |
616 | |
617 #ifndef PRODUCT | |
618 void InlineTree::print_impl(outputStream* st, int indent) const { | |
619 for (int i = 0; i < indent; i++) st->print(" "); | |
620 st->print(" @ %d ", caller_bci()); | |
621 method()->print_short_name(st); | |
622 st->cr(); | |
623 | |
624 for (int i = 0 ; i < _subtrees.length(); i++) { | |
625 _subtrees.at(i)->print_impl(st, indent + 2); | |
626 } | |
627 } | |
628 | |
629 void InlineTree::print_value_on(outputStream* st) const { | |
630 print_impl(st, 2); | |
631 } | |
632 #endif |